If you're only concerned with saving lives then come up with some actually feasible ideas for improving evacuations.

I don't think you are grasping the fact that this project of yours is essentially impossible at this point in time. It would be the largest engineering project in the history of the human race. Construction would take decades. Upkeep would cost trillions and require constant massive-scale maintenence. Let alone the environmental effects that you are completely ignoring.

You are also ignoring the point that hurricanes are a necessary part of the climate. They occur for a reason. Do you honestly think we should cut off such a large vent of tropical energy? Do you even have the faintest idea of what that would do? No, you don't, because no one knows.

Are you pulling these figures out of thin air? How can you arbitrarily declare that you can cool the entire Gulf 25 degrees in 14 days? I would like to see these "calculations".